Cells are the smallest unit of life and the building blocks for all organisms. Each component of a cell has its own function. Animal and plant cells differ and they have similarities. Nucleus ...

All animal cells are surrounded by a membrane which contains the cytoplasm. Nearly all animal cells contain a nucleus. Plants produce food through photosynthesis. Most of this process takes place ...

The (a) intestine, (b) esophagus and (c) stomach are shown. Quiescent stem cells (d) through asymmetric division probably give rise to more rapidly dividing active stem cells, which then produce ...